One-way gate valve

Abstract

The utility model discloses a one-way gate valve which comprises a valve body and a valve cover which are detachably connected, the valve body is provided with a flow channel, the valve cover is in threaded connection with a valve rod inserted into the valve body, and the lower end of the valve rod is connected with a gate capable of blocking the flow channel. The flow channel on the left side of the gate plate is provided with an annular sealing convex rib which can abut against the inclined face, a lower cavity which is used for allowing the valve rod and the gate plate to move and is communicated with the flow channel is formed in the valve body, an upper cavity which is communicated with the lower cavity is formed in the valve cover, and an air inlet connector which is communicated with the upper cavity is arranged on the valve cover. According to the one-way gate valve, the problem of powder accumulation is solved, the sealing performance is better, the length of the gate valve is shorter, the production cost is reduced, the gas inlet connector can be connected with an external gas source, powder and dust in the valve body can be cleaned up, the sealing performance of the gate valve is ensured, nitrogen or other gas can be blown into the gate valve through the gas inlet connector, and the applicability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, concretely relates to a one-way gate valve. BACKGROUND

[0002] Gate valve belongs to one kind of valve, and sealing is carried out through the contact of valve body and gate, for example, the Chinese utility model patent with the application number CN202410071723.4 discloses a kind of anti-coking and abrasion wedge-shaped elastic single gate valve with guide distribution structure, including flange, valve body, valve cover, valve frame, valve stem, valve stem sealing sleeve, wedge-shaped gate, valve seat, valve stem sealing gland, gate valve opening and closing mechanism, and oil product upper injection structure respectively arranged on the valve cover cover body and oil product lower injection structure arranged in the lower part of valve body;A circle of annular U-shaped groove perpendicular to the surface of the periphery arc surface panel body of the wedge-shaped gate is equipped, and the annular U-shaped groove on the wedge-shaped gate, the recessed structure of valve seat and the lower part of valve body form annular valve channel cavity in valve body, and the whole valve inner cavity of valve body is formed by the annular valve channel cavity and valve stem cavity communication;The oil product upper injection structure is connected by oil product upper injection valve, oil product upper injection nozzle and guide distribution nozzle, and the guide distribution nozzle and oil product upper injection pipe body constitute the deflection angle and installation angle suitable for different specifications of valve body inner cavity use.This kind of gate valve needs to be provided with large circular arc groove in flow channel, which is sealed by cooperating with gate insertion, and the sealing of gate valve is completed after gate moves down and contacts with large circular arc groove, however, in actual use process, on the one hand, powder can deposit in large circular arc groove after feeding is completed, thereby affecting the sealing performance of gate valve, on the other hand, the length of gate valve is increased, thereby increasing production cost. SUMMARY

[0003] In view of the deficiencies in the background art, the technical problem to be solved by the utility model is to provide a one-way gate valve capable of preventing powder accumulation, having better sealing performance and shorter length.

[0004] To this end, the utility model is implemented by adopting the following technical scheme:

[0005] A one-way gate valve, including detachably connected valve body and valve cover, the valve body has flow channel, the valve cover is screwed with valve stem inserted into valve body, the lower end of valve stem is connected with gate capable of blocking flow channel, characterized by: the left end face of gate is inclined surface inclined from top to bottom to right, and the flow channel of left side of gate has annular sealing rib capable of abutting against inclined surface, the lower chamber capable of being in communication with flow channel and accommodating valve stem and gate is arranged in valve body, the upper chamber in communication with lower chamber is arranged in valve cover, and air inlet joint in communication with upper chamber is arranged on valve cover.

[0006] Further, the lower end of the valve cover is provided with a first opening groove, the upper end of the valve body is provided with a second opening groove aligned with the first opening groove, and a metal graphite ring is arranged between the first opening groove and the second opening groove.

[0007] Further, the flow channel on the left side of the gate plate is in the shape of a circular truncated cone with a gradually increasing diameter from right to left.

[0008] Further, the flow channel on the right side of the gate plate is provided with an opening compression ring capable of abutting against the right end surface of the gate plate.

[0009] Further, the upper end of the valve rod is connected with a hand wheel or an electric actuator.

[0010] Further, the valve body and the valve cover are provided with a plurality of opposite mounting holes, bolts are arranged in the mounting holes, and nuts are used for fastening.

[0011] Further, the left and right sides of the valve body and the valve cover are provided with insertion holes, and the insertion holes are provided with insertion pins, and the air inlet connector is arranged on the front side or the rear side of the valve cover.

[0012] After the above technical scheme is adopted, the gate plate is opened for feeding, and the sealing of the gate valve can be completed after the inclined surface of the gate plate abuts against the annular sealing convex rib in the flow channel, thereby replacing the large circular arc groove for cooperating with the gate plate for sealing in the prior art. The powder does not sink to the bottom and flows naturally, which not only solves the problem of powder accumulation, but also makes the sealing better, and the length of the gate valve is shorter, thereby reducing the production cost. In addition, the air inlet connector can be connected with an external air source, air is blown into the upper chamber, the lower chamber and the flow channel after the feeding is completed, the powder and dust in the valve body can be cleaned, the gate plate is moved downward for sealing after the air is blown, the sealing performance of the gate valve is ensured, nitrogen or other gas can be blown into the gate valve through the air inlet connector, so that different requirements in different processing environments (for example, oxygen-free environment) are met, and the applicability is stronger. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model discloses the following drawings:

[0014] Figure 1 It is the structure schematic diagram of the utility model in the closed state (remove bolt nut).

[0015] Figure 2 It is Figure 1 It is the sectional view of A-A direction.

[0016] Figure 3 It is the three-dimensional structure schematic diagram of the utility model in the open state (remove bolt nut) (the arrow in the drawing is the feeding direction).

[0017] 1, valve body; 2, valve cover; 3, flow channel; 4, valve stem; 5, gate; 6, inclined surface; 7, annular sealing convex rib; 8, lower chamber; 9, upper chamber; 10, air inlet joint; 11, first open slot; 12, second open slot; 13, metal graphite ring; 14, open compression ring; 15, hand wheel; 16, mounting hole; 17, insertion hole; 18, insertion pin. DETAILED DESCRIPTION

[0018] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0019] With reference to the drawings shown above, the one-way gate valve provided by the utility model comprises a detachably connected valve body 1 and valve cover 2, the valve body 1 is provided with a flow channel 3, the valve cover 2 is screwed with a valve stem 4 inserted into the valve body 1, the lower end of the valve stem 4 is connected with a gate 5 capable of blocking the flow channel 3, and the gate 5 is characterized in that: the left end face of the gate 5 is an inclined surface 6 inclined from top to bottom to the right, and the flow channel 3 on the left side of the gate 5 is provided with an annular sealing convex rib 7 capable of abutting against the inclined surface 6, the valve body 1 is provided with a lower chamber 8 capable of moving the valve stem 4 and gate 5 and communicating with the flow channel 3, the valve cover 2 is provided with an upper chamber 9 communicating with the lower chamber 8, the valve cover 2 is provided with an air inlet joint 10 communicating with the upper chamber 9, the lower end of the valve cover 2 is provided with a first open slot 11, the upper end of the valve body 1 is provided with a second open slot 12 aligned with the first open slot 11, the metal graphite ring 13 is arranged between the first open slot 11 and the second open slot 12, the flow channel 3 on the left side of the gate 5 is in the shape of a circular truncated cone with gradually increasing diameter from right to left, the flow channel 3 on the right side of the gate 5 is provided with an open compression ring 14 capable of abutting against the right end face of the gate 5, the upper end of the valve stem 4 is connected with a hand wheel 15 or an electric actuator, the valve body 1 and valve cover 2 are provided with a plurality of opposite mounting holes 16, the mounting holes 16 are provided with bolts and fastened by nuts, the left and right sides of the valve body 1 and valve cover 2 are provided with insertion holes 17, the insertion holes 17 are provided with insertion pins 18, and the air inlet joint 10 is arranged on the front side or rear side of the valve cover 2.

[0020] In this embodiment, the gate 5 is opened to perform feeding ( Figure 3The inclined surface 6 of the flashboard 5 abuts against the annular sealing convex rib 7 in the flow channel 3 to complete the sealing of the flashboard 5 valve, replacing the large circular arc groove in the prior art for cooperating with the flashboard 5 to seal, so that the powder does not sink to the bottom and flows naturally, which not only solves the problem of powder accumulation, but also makes the sealing better, and the length of the flashboard 5 valve is shorter, thereby reducing the production cost. In addition, the air inlet joint 10 can be connected to an external air source to blow air into the upper chamber 9, the lower chamber 8 and the flow channel 3 after the feeding is completed, so that the powder and dust in the valve body 1 can be cleaned, and the flashboard 5 is moved downward to seal after the air blowing, so as to ensure the sealing of the flashboard 5 valve. The air inlet joint 10 can also blow gas into the flashboard 5 valve to meet different requirements of different processing environments (such as oxygen-free environment), so that the applicability is stronger. The metal graphite ring 13 is arranged to enhance the high temperature resistance of the one-way flashboard 5 valve. The first opening groove 11 and the second opening groove 12 are arranged to position the metal graphite ring 13, so that the structure is more stable. The flow channel 3 on the left side of the flashboard 5 is a circular table with a diameter gradually increasing from right to left, so that the accumulated powder can slide out of the flow channel 3 due to gravity, thereby avoiding powder accumulation. The opening compression ring 14 plays a guiding and positioning role during the upward and downward movement of the flashboard 5, so as to ensure the sealing. The valve rod 4 can be driven by the hand wheel 15 or the electric actuator, so that the applicability is stronger. The arrangement of the bolt 18 makes the valve body 1 and the valve cover 2 have a guiding effect during installation, thereby facilitating assembly.

[0021] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed in the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A one-way gate valve, comprising a detachably connected valve body and a valve cover, the valve body having a flow channel, the valve cover being screwed to a valve stem inserted into the valve body, the lower end of the valve stem being connected to a gate capable of blocking the flow channel, characterized in that: The left end surface of the gate is an inclined surface which inclines to the right from top to bottom, and the flow channel on the left side of the gate has an annular sealing rib which can abut against the inclined surface, the valve body is provided with a lower chamber which is in communication with the flow channel and in which the valve stem and the gate are movably arranged, the valve cover is provided with an upper chamber which is in communication with the lower chamber, and the valve cover is provided with an air inlet joint which is in communication with the upper chamber.

2. A one-way sluice valve according to claim 1, characterized in that: The lower end of the valve cover is provided with a first open slot, the upper end of the valve body is provided with a second open slot which is aligned with the first open slot, and a metal graphite ring is arranged between the first open slot and the second open slot.

3. A one-way sluice valve according to claim 1 or 2, characterized in that: The flow channel on the left side of the gate is a circular truncated cone which gradually increases in diameter from right to left.

4. A one-way sluice valve according to claim 3, characterized in that: The flow channel on the right side of the gate has an open compression ring which can abut against the right end surface of the gate.

5. A one-way sluice valve according to claim 3, characterized in that: The upper end of the valve stem is connected with a hand wheel or an electric actuator.

6. A one-way sluice valve according to claim 3, characterized in that: The valve body and the valve cover are provided with a plurality of opposite mounting holes, bolts are arranged in the mounting holes, and nuts are used to fasten the bolts.

7. A one-way sluice valve according to claim 3, characterized in that: The left and right sides of the valve body and the valve cover are provided with insertion holes, and the insertion holes are provided with insertion pins, and the air inlet joint is arranged on the front side or the rear side of the valve cover.

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